Geometrical Terms
Overview
Geometry has its own precise vocabulary, and using it correctly is the first step to every proof, construction and calculation that follows. Knowing exactly what perpendicular, congruent, chord and reflex angle mean lets you read a question accurately and explain your reasoning clearly.
In this lesson you will build a clear glossary of geometrical terms: kinds of line and angle, the language of triangles, special quadrilaterals and polygons, simple solids, and the parts of a circle. Mastering this vocabulary now makes all the geometry that comes later far easier to follow.
Objectives
- Use and interpret the following geometrical terms: point vertex line parallel perpendicular bearing right angle acute, obtuse and reflex angles interior and exterior angles similar congruent scale factor.
- Use and interpret the vocabulary of: triangles special quadrilaterals polygons simple solids.
- Use and interpret the vocabulary of a circle.
Audio Lesson
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Mind map
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Flashcards
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Geometrical Terms. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- An angle of 210 degrees is best described as: A. acute B. obtuse C. reflex D. a right angle Answer: C
- Two shapes that are exactly the same shape and size are: A. similar B. congruent C. parallel D. perpendicular Answer: B
- A straight line that joins two points on a circle without passing through the centre is a: A. radius B. diameter C. chord D. tangent Answer: C
- A region of a circle bounded by two radii and an arc is a: A. segment B. sector C. chord D. tangent Answer: B
- Two lines that meet at a right angle are: A. parallel B. perpendicular C. similar D. congruent Answer: B
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